Merge "Improve documentation for IntentService"

package android.app;

import android.annotation.WorkerThread;

import android.annotation.Nullable;

import android.content.Intent;

import android.os.Handler;

import android.os.HandlerThread;

    }

    @Override

    public void onStart(Intent intent, int startId) {

    public void onStart(@Nullable Intent intent, int startId) {

        Message msg = mServiceHandler.obtainMessage();

        msg.arg1 = startId;

        msg.obj = intent;

     * @see android.app.Service#onStartCommand

     */

    @Override

    public int onStartCommand(Intent intent, int flags, int startId) {

    public int onStartCommand(@Nullable Intent intent, int flags, int startId) {

        onStart(intent, startId);

        return mRedelivery ? START_REDELIVER_INTENT : START_NOT_STICKY;

    }

     * @see android.app.Service#onBind

     */

    @Override

    @Nullable

    public IBinder onBind(Intent intent) {

        return null;

    }

     *

     * @param intent The value passed to {@link

     *               android.content.Context#startService(Intent)}.

     *               This may be null if the service is being restarted after

     *               its process has gone away; see

     *               {@link android.app.Service#onStartCommand}

     *               for details.

     */

    @WorkerThread

    protected abstract void onHandleIntent(Intent intent);

    protected abstract void onHandleIntent(@Nullable Intent intent);

}